Principles of Geotechnical Engineering (MindTap Course List)
9th Edition
ISBN: 9781305970939
Author: Braja M. Das, Khaled Sobhan
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 5, Problem 5.1CTP
The subsurface characteristics for a highway pavement rehabilitation project in the southeastern United States are shown in a “boring log” in Figure 5.13. The highway structure consists of the asphalt pavement underlain by four different soil strata up to a depth of 20 ft, after which the boring was terminated. Some data on the grain size and plasticity characteristics are also provided for each stratum. Perform the following tasks:
- 1. Determine the AASHTO soil classification and the group index (GI) for each layer.
- 2. Determine the “most probable” group symbols and group names for the various layers according to the Unified soil classification system. Use Table 5.3 and the soil characteristics given in the boring log.
Expert Solution & Answer
Trending nowThis is a popular solution!
Students have asked these similar questions
I am working on a lab report for a sieve analysis that was conducted in the lab. I got that the soil was made up of approximately: 20.5% gravel, 77.8% sand, and 1.7% fines. The values for the coefficient of uniformity (Cu) and coefficient of gradation (Cc) are 10.56 and 0.528 respectively. What does this mean when it comes to engineering design? Would the soil be considered good for building a structure? If so, is there a specific type of structure that would work best with this type of soil?
In the conventional laboratory compression test, what is the cause of soil volume decrease?
The soil sample is 75% gravel with laboratory result shown below. Is it well graded or poorly graded?
D10 = 0.08 mm
D30 = 0.22 mm
D60 = 0.41 mm
Select one:
a. Poorly graded
b. Well graded
Chapter 5 Solutions
Principles of Geotechnical Engineering (MindTap Course List)
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.Similar questions
- 00 docs.google.com/forms/ A It is easier than the sieve analysis CH soil is formed by chemical 1/1 weathering * True False Neither true nor false The grain size distribution has 0/2 been conducted on a soil sample and the following have been obtained: Percentage of passing from sieve number 200 is 47%, LL = 30%, PL = 15% Using the above information, the soil classification according to the USCS is * :O A5arrow_forward4. Phase Diagram A soil sample was obtained at the underground parking garage that Dr. Barry is constructing at his home with a volume (VT) of 0.05 ft', total weight (WT) of 4.2 lbs, weight of water (Ww) of 0.37 lbs and a specific gravity (Gs) 2.70. Draw a complete phase diagram and determine the void ratio (e), moist unit weight (y), saturated unit weight (ysat), dry unit weight (Yary), weight of the solids (W.), volume occupied by the solids (V.), volume occupied by the water (V), volume occupied by the air (VA). volume of the voids (Vv), porosity (n), moisture content (w), and percent saturation (S). Use English units in your solution. Show all of your work.arrow_forwardQ3. A 1200 g sample of Gravel in the SSD condition in air and weighed 770 g when immersed in water. Also, a 500 g sample of Sand in the SSD condition in air and weighed 300 g when immersed in water Calculate the BSG(SSD) of the sand and gravel 1) the BSG (SSD) of the Gravel * 1.2.791 2.4.71 3.3.703 4.2.50 2) the BSG (SSD) of the Sand * 1.2.221 2.3.590 3.2.500 4.3.232 Choose one answer and write the answer number for mearrow_forward
- Geotechnical Engineering Please help me answer this question, and please show your solutions write it properly. Problem 3 A soil sample with a grain specific gravity of 2.67 was filled in a 1000mL container in the loosest possible state and the dry unit weight of the sample was found to be 14.75 N. It was then filled at the densest obtainable state and the weight was found to be 17.70 N. The void ratio of the soil in the natural state was 0.63. Determine the relative density in the natural state.arrow_forwardA cohesive soil sample is subjected to an unconfined compression test. The sample fails at a pressure of 3850 lb/ft2 [i.e., unconfined compressive strength lb/ft2]. Determine the soil’s cohesion.arrow_forwardSoil classification requires all of the results of the following tests: Liquid limit and Plastic limit tests Atterberg limit and Hydrometer tests Atterberg limit and grain size analysis test Sieve and Hydrometer analysis testsarrow_forward
- 2.7 The results of a liquid limit test and a plastic limit test on a sample of soil are given below: liquid limit cone penetration (mm) water content (%) 21.2 56.0 23.2 24.7 14.8 50.8 16.9 19.1 52.9 54.2 57.3 58.7 plastic limit water content of threads (%%) 26.6 and 27.3 Determine the liquid limit, plastic limit, plasticity index and soil classification,arrow_forwardA one-dimensional consolidation test was performed on a sample, 0.75-inch high, taken from a field clay layer. During the test, drainage was allowed at the upper and lower boundaries. It took the lab sample 15 minutes to reach 50% consolidation. If the clay layer in the field has the same drainage condition as the lab sample, calculate how many days it will require the 10 feet clay layer to achieve 50% and 90% consolidation.arrow_forwardA materials supplier presented the following values for a sample of their CBR tests for subgrade soil. What mean absolute deviation (MD) for the results. 4.1 4.3 4.5 4.7 4.9 4 3 2 CBR Frequency 1 2 4.55 O 2.33 0.19 O 0.21arrow_forward
- A clean sandstone core sample with diameter of 3.8 cm and length of 5.6 cm is saturated with a brine. The core was desaturated in several steps, and the resistance was measured at each saturation. The results are as follows: Water Saturation (Fraction) Resistance (kS) 1.000 1.302 0.900 1.695 0.800 2.283 0.730 2.878 0.640 3.775 0.560 5.637 0.480 7.838 0.375 13.175 0.350 17.050 0.300 26 Brine resistivity= 0.74 2m Archie coefficient 1.03 Cementation factor= 2.2147 (1) Estimate the rock porosity. (2) Determine the saturation exponent. (3) Estimate the amount of oil and brine (in cc) in the core sample when resistivity index is 5. All steps of the calculations should be shown.arrow_forwardSoil resistance to failure is provided by its shear strength. How is shear strength developed in different types of soil?arrow_forwardA hydrometer test was conducted on the material passing sieve No, 200 and the results are listed in the table below, The results of sieve analysis on the soil showed that the percentage passing No. 4 was 90 % and that passing No. 200 was 20 %. Estimate the clay size fraction in the soil. Table : Results of hydrometer test diameter (mm) 0.0700 0.0400 0.0150 0.0020 % finer (combined) 19 finer 95 80 16 65 13 45 0.0010 30 6 Select one:arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Principles of Geotechnical Engineering (MindTap C...Civil EngineeringISBN:9781305970939Author:Braja M. Das, Khaled SobhanPublisher:Cengage Learning
Construction Materials, Methods and Techniques (M...Civil EngineeringISBN:9781305086272Author:William P. Spence, Eva KultermannPublisher:Cengage Learning
Principles of Geotechnical Engineering (MindTap C...
Civil Engineering
ISBN:9781305970939
Author:Braja M. Das, Khaled Sobhan
Publisher:Cengage Learning
Construction Materials, Methods and Techniques (M...
Civil Engineering
ISBN:9781305086272
Author:William P. Spence, Eva Kultermann
Publisher:Cengage Learning
How Are Highways Designed?; Author: Practical Engineering;https://www.youtube.com/watch?v=9XIjqdk69O4;License: Standard Youtube License